Bill is running so fast!I _________believe my eyes.（ ）
A．needn'tB．shouldn'tC．mustn'tD．can't
—I don’t know when ______ tomorrow.—I will call you as soon as he ______.
| A．will he come; arrives |
| B．he will come; arrives |
| C．he will come; will arrive |
| D．he comes; will arrive |
——Excuse me. Is it my turn now?
——Not yet. Please wait on the chair ______your name is called.
| A．and | B．until | C．although | D．since |
I was surfing the Internet my brother was doing his homework.
| A．after | B．because | C．while | D．When |
She has studied in this school she was seven years old.
| A．since | B．if | C．until | D．after |
While Helen _____ along the river after supper, she ____ a wallet lying on the roadside.
A. was walking; was finding
B. walked; found
B. walked; was finding
D. was walking; found