________ excited Geoff Marcy most was whether there were planets in other solar system where life might exist.
| A．It | B．That | C．What | D．Why |
I ______ through that bitter period without your generous help.
| A．couldn’t have gone | B．didn’t go |
| C．wouldn’t go | D．hadn’t gone |
Even the best writers sometimes find themselves _____ for words.
| A．lose | B．lost | C．to lose | D．having lost |
The island, _____ to the mainland by a bridge, is easy to go to.
| A．joining | B．to join | C．joined | D．having joined |
Find ways to praise your children often , _____ you’ll find they will open their hearts to you.
| A．till | B．or | C．and | D．but |
It was April 29, 2011 _____ Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.
| A．that | B．when | C．since | D．before |