句意：Jack Ma is ambitious about his firm’s future, ______ that Alibaba’s achievements will one day top Walmart.
| A．says | B．to say | C．saying | D．said |
No one really knows exactly when the first people arrived in we now know as California.
| A．that | B．which | C．what | D．where |
I feel sure that qualification, ability and experience, you are well suited to the position we have in mind.
| A．in need of | B．in spite of | C．by means of | D．in terms of |
The theory most scientists objected to in the end .
| A．being proved to be of significance | B．was proved to be significance |
| C．proving to be significant | D．proved to be significant |
He knew the problem was serious and undertook to look into it he reached the office.
| A．suddenly | B．immediately | C．abruptly | D．shortly |
To my delight, the snakes, carefully, turned out to be no trouble and all went well according to the plan.
| A．monitoring | B．being monitored | C．having monitored | D．monitored |