His aunt’s letters ________ him of those beautiful days when they used to live together in his hometown.
| A．call up | B．call for | C．call on | D．call at |
The drill in Antarctica dragged on slowly because of lack of money, equipment breakdowns, environmental_________ and severe cold.
| A．concerns | B．assumption |
| C．occupations | D．ignorance |
. ---Where did the couple find their child?
---It was in the park_________ the family used to camp.
| A．that | B．where | C．which | D．when |
He stayed up too late every night, _____ to catch up with his classmates.
| A．having determined | B．being determined |
| C．determined | D．to determine |
I like getting up very early in summer. The morning air is so good______.
| A．to breathe | B．to be breathed |
| C．breathing | D．being breathed |
I agree with most of what her lecture said, but I don’t agree with ____ she said.
| A．everything | B．something |
| C．anything | D．nothing |