It was in 1969 ________ two Americans went to the moon by spaceship.
| A．when | B．that | C．at that time | D．just then |
---- Could I have a word with you?
---- Sorry, I am busy ______. Shall we do it later?
| A．at the moment | B．for a moment | C．on the moment | D．in a moment |
---Why didn’t you go to yesterday’s meeting?
---I would have but I ______ too busy working on the important experiment.
| A．had been | B．was | C．were | D．am |
According to the rules, students must not ____ their books during examinations.
| A．read | B．watch | C．notice | D．look at |
The summer is already here, and it _____ to be a most severe one.
| A．wants | B．hopes | C．promises | D．wishes |
The bad weather meant__________ the rocket launch（发射）for 48 hours,．
| A．delaying | B．having delayed |
| C．to delay | D．to have delayed |