Find ways to praise your children often，________ you'll find they will open their hearts to you.(2011·山东)
| A．till | B．or | C．and | D．but |
It was not _______she took off her glasses ______I realized she was my former classmate .
| A．when; that | B．until; that | C．until; when | D．when; then |
The old man has expected to see all his children when he was in hospital, but ______ came to see him.
| A．none | B．no one | C．someone | D．anyone |
David apologized for _______to inform me of the change in the plan.
| A．his being not able | B．him not to be able |
| C．his not being able | D．him to be not able |
Jackson returned to Seattle for a while, ______ to Canada, and worked a few jobs there before heading for New York .
| A．moving | B．moved | C．being moved | D．having moved |
We were swimming in the lake _____ suddenly the storm started.
| A．when | B．while | C．until | D．before |