—You may find the key to the maths problem on page 107.
—Ah, it’s so simple. I wonder why I ＿of that.
| A．hadn’t thought | B．haven’t thought |
| C．didn’t think | D．wasn’t thinking |
He often made his sister ______, but this time he was made ______ by his sister.
| A．cry; to cry | B．cry; cry | C．to cry; cry | D．to cry; to cry |
—You seem to have lost your way. ______?
—I’m looking for the nearest post office.
| A．What for | B．Need help | C．Where to | D．What if |
—You should have given me a ring before you left.
—I meant______, but I was in a hurry that time.
| A．to do | B．to | C．do | D．doing it |
Some researchers believe that there is no doubt ______a cure for AIDS will be found.
| A．which | B．whether | C．that | D．what |
He was about to tell me the secret ______ someone patted him on the shoulder.
| A．as | B．while | C．when | D．until |