It was in a poor family ____ the great scientist was born.
| A．when | B．that | C．which | D．how |
We had to spend three more hours waiting in ______cafe at the airport because _______ flight was delayed.
| A．a; the | B．不填; the | C．the; 不填 | D．a; a |
Only after my friend came .
| A．did the computer repair | B．he repaired the computer |
| C．was the computer repaired | D．the computer was repaired |
There is a popular view in cities, strangers are less likely to help an elderly person.
| A．that | B．whether | C．why | D．how |
Flowers suddenly burst out everywhere on the same day every spring, as if they in tune with one another.
| A．are | B．were | C．have been | D．are to be |
The kangaroo was lucky. It just missed .
| A．catching | B．to be caught | C．to catch | D．being caught |