The price __________,but I doubt whether it will remain so.
| A．went down | B．will go down |
| C．has gone down | D．was going down |
His teacher told him that since his parents were working abroad, either his grandparents or one of his uncles ______ allowed to come to the parents’ meeting .
| A．was | B．were | C．are | D．is |
---It is known to all that this factory pours lots of waste water into the Changjiang River every year.
---- _________ near my hometown.
| A．So does it | B．So it is | C．So the one does | D．So does the one |
He didn’t attend the meeting last night, _________ he doesn’t know our plan for the picnic.
| A．that’s why | B．that’s because | C．which is why | D．which is because |
In 1778, Banks was elected ________president of the Royal Society, ________position he held for 42 years.
| A．/, a | B．/ , the | C．the, a | D．the, the |
He _______ English for four years before he went abroad.
| A．has studied | B．was studying |
| C．has been studying | D．had been studying |