"Long time no see" is __________ sort of informal. But it is part of __________ language that Americans use daily.
A. the; a B. a; the C. /; the D a; a
__________for the bus, I heard a noise,
| A．While waiting | B．While I waiting | C．I was waiting | D．Waited |
To the parents’ worry, some middle school students are ______ computer games and completely forget their studies.
| A．crazy about | B．fond of | C．concerned for | D．serious about |
It was in 1969 ______ two Americans went to the moon by spaceship.
| A．when | B．that | C．at that time | D．just then |
She pretended to be calm but _______she was more than nervous
at the time she was being questioned.
| A．in actual | B．actually | C．as matter of fact | D．in a fact |
The problem ________ at the meeting yesterday.
| A．came to | B．came across | C．came up | D．came up with |