A) are/ doing b) have done
21-just-breakfast. (have)
a) have/had b) am/doing
3 They -already in the river. (su
a) swam
(b) have/swum
4 - you ever - to London? (be)
been
a) was
51 - never the Queen (see)
a) saw
b) have/scen
6 It-just - into the river. (fall)
a) has/fallen b) felt