Test I. Choose the correct answers.

1. An emergency signal has to all ships in the area.
a)to be sent b) to sent c) sent d) be sent

2. That report written before the end of next week.
a) need to be b) has c) needs to be d) needs

3.Those dangerous chemicals brought into this secure room.
a) never be b) must not be c) do not ever d) must not

4. Seat belts at all times during the flight.
a) should wear b) should to wear
c) should worn d) should be worn

5. One work with electric devices barehanded

a) must b)wants c)likes d) should never

1. An emergency signal has to be sent to all ships in the area.
Explanation: In this sentence, we need to use the "be" form of the verb "to send" in order to form the passive voice. The verb "has" or "sent" alone would not make sense in this sentence. Therefore, the correct answer is "a) to be sent."

2. That report needs to be written before the end of next week.
Explanation: In this sentence, we need to use the phrase "needs to be" to indicate that something is necessary or required to happen. The other options do not convey the same meaning. Therefore, the correct answer is "c) needs to be."

3. Those dangerous chemicals must not be brought into this secure room.
Explanation: In this sentence, we want to express that bringing dangerous chemicals into the secure room is prohibited. Therefore, we need to use the phrase "must not be" to emphasize the prohibition. The other options do not convey the same meaning. Therefore, the correct answer is "d) must not."

4. Seat belts should be worn at all times during the flight.
Explanation: In this sentence, we want to express that wearing seat belts is recommended or advisable during the flight. Therefore, we need to use the phrase "should be worn" to convey this meaning. The other options do not convey the same meaning. Therefore, the correct answer is "d) should be worn."

5. One should never work with electric devices barehanded.
Explanation: In this sentence, we want to express that it is never acceptable to work with electric devices without wearing protective gear, specifically gloves in this case. Therefore, we need to use the phrase "should never" to convey this meaning. The other options do not convey the same meaning. Therefore, the correct answer is "a) must."