As hiring _______ more global, both for employers and candidates, video interviewing is a way to speed up the interview process.
| A．became | B．has become |
| C．will become | D．had become |
My son has gone abroad. I’m looking forward to him_______.
| A．return | B．to return | C．returning | D．returned |
It is good manners to eat up _______is left in your plate.
| A．that | B．what | C．which | D．all |
Can you explain ________ the sun goes down in the west?
| A．why is it that | B．why it is that | C．how it is that | D．how is it that |
A huge amount of oil was spilt on the East Sea, the causes of ______ are still under investigation.
| A．it | B．that | C．which | D．whom |
--- Has James finished his report on his Enquiry Learning yet?\
---- I’m not sure. He _____ on it last week.
| A．was working | B．has worked | C．worked | D．had worked |