________ important tool the computer is!
A. How B. How an C. What D. What an
I won’t go to Zhang Wei’s birthday party ________ I am invited.
A. unless B. because C. if D. when
—— Would you like to see the film with me？
—— I’m sorry I ________ it twice.
A. see B. will see
C. have seen D. am seeing
Students like the teachers ________ make their classes lively.
A. where B. which C. what D. who
I will tell him the news when he ________ back.
A. comes B. came C. will come D. come
Susan with her parents ________ the yard when I saw her.
A. is cleaning B. are cleaning
C. was cleaning D. were cleaning
