—_________ work in Microsoft? —Yes, I did.
| A．Did you used to | B．Did you use to | C．Do you used to | D．Was you use to |
—You aren’t a stranger, are you?
—______, don’t you remember______me at the school gate ten minutes ago?
| A．Yes; to see | B．No; seeing |
| C．No; saw | D．Yes; seeing |
Newton was playing under an apple tree ____ an apple fell onto his head.
| A．when | B．while |
| C．after | D．before |
Which of the diagrams below shows the air temperature of Beijing in a year?
______ great scientist Qian Xuesen is!
| A．How | B．How a |
| C．What | D．What a |
I don’t know when he ______. When he ______, I will let you know.
| A．will arrive, will arrive |
| B．arrives, arrives |
| C．will arrive, arrives |
| D．arrives, will arrive |