It never occurred to humans until the mid-1990s ______ some animals can be cloned.
| A．where | B．that | C．when | D．what |
Word came from Mr. Smith __________ he could arrive on the following Saturday.
| A．where | B．that | C．whether | D．which |
---Do you think Peter is free today?
---I don’t think so. Recently he has been ______ the most of his time to prepare for the final examinations.
| A．making | B．planning | C．using | D．getting |
The millionaires, ____, are not happy as most of us had thought.
| A．honest | B．to be honest | C．honest | D．to be honesty |
He was seriously ill. That’s _______ he didn’t appear at the party.
| A．because | B．what | C．why | D．when |
He didn’t make ______ clear when and where the mee
ting would be held.
| A．this | B．that | C．it | D．these |