.This printer is of high quality and very expensive. ________, we would buy __________.
| A．Should the price of it be brought down; one |
| B．If the price of it be brought down; one |
| C．The price of it was brought down; it |
| D．Brought down; it |
_______ your advice, I wouldn’t be in such an embarrassing situation now.
| A．If I followed | B．Should I follow |
| C．Had I followed | D．If I could have followed |
The missing Malaysia Airlines Flight MH370 was officially declared an _______ and it was a difficult moment for all.
| A．issue | B．affair | C．event | D．Accident |
He _______ around the clock since June, when the first Ebola case appeared in this agricultural county.
| A．had been working | B．has been working |
| C．is working | D．was working |
India’s space agency _______ its first pictures of Mars as its satellite begins work a day after entering orbit around the Red Planet.
| A．releases | B．replaces |
| C．relieves | D．Recognizes |
Yao Ming ended his career as a basketball player and officially________.
| A．retired |
| B．confirmed |
| C．divided |
| D．covered |