They spent as many hours as they could ___their lessons.
A.study
B. to study
C. studying
－ Is your father in?
－ No, he ______ for three hours.
| A．was out | B．has been out |
| C．went out | D．has gone out |
What he said made them ______.
| A．angrily | B．happily | C．exciting | D．surprised |
How times flies! Ten years ______ passed.
| A．have | B．has | C．is | D．are |
How long can I ______ the book? –Two weeks.
| A．borrow | B．have | C．lend | D．keep |
He hasn’t ______ to New York ______, but he’ll go.
| A．gone; still | B．been; yet |
| C．gone; already | D．been; already |