With help, we finished our work on time.
A. they B. them C. their D. theirs
There is insect on the ground. The child is very interested in it.
A.a B./ C.the D.an
People have learned a lot fromstudies.
A. science B. scientific
C. scientist D. sightseeing
The computer was invented in the 20th
A. sentence B. center
C. concert D. century
The boy often got intowith the police.
A. through B. terrible
C. trouble D. Trousers
Please remember tothe cat before you leave.
A. feed B. foot
C. food D. find