For more than a decade, experts from across the globe ________ on the cure of the disease that way.
| A．worked | B．are working | C．have been working | D．were working |
________ the punishment was unjust , he would accept it without saying anything, because he knew it was the rule of the company.
| A．As though | B．Even though | C．In case | D．Now that |
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 |