Over the past 40 years, 29 other Chinese people ____ Mount Qomolangma successfully.
| A．climbed | B．have climbed | C．had climbed | D．climb |
Henry had just given himself for lost ______ he was spotted by a ship.
| A．when | B．while | C．as | D．after |
—Could I use your bike?
—Yes, surely you ______.
| A．might | B．will | C．can | D．should |
He couldn’t ______ the fact that the money was found in his house.
| A．answer for | B．leave for | C．account for | D．care for |
Many scientists believe that the universe began with an enormous explosion called the “Big Bang”, ______ happened about 13.7 billion years ago.
| A．that | B．which | C．when | D．what |
—Don’t forget to visit me when you come to Beijing.
—______.
| A．I don’t | B．I won’t | C．I can’t | D．I haven’t |