He didn’t know _____ask for help when the accident suddenly happened.
A.whom to B. what to C. why to
My brother has _____the army since 2 years ago.
A. joined B. been in C. taken part in
Chinese is becoming more and more popular and_____in many schools around the world.
A. is teaching B. has taught C. is taught
—It’s no use speaking to him. He’s _____.
—I’m sorry. I’ll show him a note.
A. blind B. deaf C. old
The two companies came to an_____ about the project on the meeting.
A. agreement B. action C. ability
China has been _____country in the world to land on the moon.
A. third B.a third C. the third
