Chang’e2 did many experiments, ______ I think are of much help for knowing space.
| A．which | B．what | C．when | D．where |
A long time ________ a person, which is really a truth.
| A．examines | B．checks | C．tests | D．experiments |
five minutes before the last bus left, we arrived at the station.
| A．There were; to go | B．With; to go | C．It was; left | D．It had; left |
________ is known to us is that time is limited and precious.
| A．What | B．That | C．It | D．As |
―I went to the beach and got plenty of rest and sunshine.
― You looked tired last time I saw you .
| A．I had hoped so. | B．Really ? |
| C．I’m glad you did. | D．That sounds a good idea. |
With no rain for three months, and the food supplies running out, the present ________ here is getting worse.
| A．case | B．condition | C．state | D．situation |