By accident, he _______he had done something wrong and that he hadn’t been prison for a few weeks.
| A．let out | B．made out | C．made sure | D．took care |
Meeting again by chance, Lucy and Amy are delighted to _______ the friendship where it left out years ago.
| A．set up | B．build up |
| C．bring up | D．pick up |
David will succeed along the career ladder one day, I firmly believe, _______ he devote more energy to it.
| A．might | B．would | C．could | D．should |
With China’s Singles’ Day approaching, shop owners offer large discounts ______ high sales volumes created by enthusiastic buyers.
| A．in expectation of | B．in regard to |
| C．in terms of | D．in response to |
Common sense requires us to get away from the concept that national boundaries are frontiers _________ knowledge may not spread.
| A．with which | B．across with |
| C．through which | D．from which |
—Could you say something about Turkey’s downing of the Russian fighter jet?
—Sorry. It ______ by a group of experts and will be made clear the moment they get the answer.
| A．has been investigated | B．is being investigated |
| C．was investigated | D．was being investigated |