Some biologists believe this is an ancient survival strategy, _______ a diet with 30 percent
fewer calories than usual increased life span.
| A．for which | B．to which | C．of which | D．in which |
Henry works as a teacher now, but he ______ on a farm for three years.
| A．has worked | B．had worked | C．worked | D．had been working |
—English has large vocabulary, hasn’t it?
—Yes,more words and expressions and you will find it easier to read and communicate.
| A．Know | B．Knowing | C．To know | D．Known |
It was in time of dangerhe made the final decisionthey should send more doctors there.
| A．that ;that | B．when; which | C．where ;what | D．where;that |
,mother will wait for him to have dinner together.
| A．However late is he | B．However he is late |
| C．However is he late | D．However late he is |
When the bell rang, the students were all sitting on their own seats quietly and looking forward to their new Chinese teacher.
| A．have seen | B．be seen | C．see | D．seeing |