___, the car started.
| A．The signal giving | B．The signal is given | C．The signal given | D．Having given the signal |
The man showed us so heavy a stone _______ no man can lift.
| A．that | B．as | C．which | D．And |
To improve your reading ability, you should ____ half an hour every day for learning new vocabulary.
| A．leave out | B．take up | C．set aside | D．focus on |
This disaster ______ that people had no knowledge of first aid and they hadn’t known how to protect them-selves in face of danger.
| A．led to | B．contributed to | C．resulted in | D．lay in |
I just wonder ____ that delights the whole family so much.
| A．what it is | B．what he does | C．how it is | D．how he does |
Yesterday evening I came across the man _____ you think is pleased to _____.
| A．who, talk | B．whom, get along with | C．who, work with | D．whom, be talked with |