It ______ six years since they last saw each other.
| A．was | B．had been | C．is | D．would have been |
You can be another Jeremy Lin you set an achievable target and stick to it.
| A．once | B．though | C．before | D．until |
He is welcome to come along, he behaves himself.
| A．provided that | B．so far as |
| C．even if | D．in case |
e-commerce worries some merchants, it contributes to the development of delivery industries.
| A．When | B．Unless | C．While | D．Until |
Paying to see that movie seems foolish you can see it on television for free.
| A．before | B．though | C．when | D．once |
―Do you still live in the countryside?
―Yes. I don’t want to leave the house, it is very shabby.
| A．though | B．because |
| C．once | D．as |