I can’t find my English book. I must ___ it at home this morning.
| A．forget | B．leave | C．have forgotten | D．have left |
Americans eat vegetables per person today as they did in 1970.
| A．more than twice | B．as twice as many |
| C．twice as many as | D．more than twice as many |
Madam Curie won two Nobel Prizes for her scientific .
| A．observation | B．achievement | C．determination | D．consideration |
The island is about 1,000 feet the coast.
| A．on | B．to | C．from | D．off |
The hunter his gun against the tree and down for a rest.
| A．laid, lay | B．lay, laid | C．laid, lied | D．lied, lay |
These problems are different from each other, so they should be dealt with .
| A．totally | B．simply | C．separately | D．extremely |