The country has already sent up three unmanned spacecrafts, the most recent ________at the end of last March.
| A．has been launched | B．having been launched | C．being launched | D．to be launched |
He raised his voice, ______ we still couldn’t hear anything．
| A．so | B．or | C．but | D．as |
I think you should complain — ____,of course, you are happy with the way things are.
| A．if | B．unless | C．as | D．because |
－How do you usually find out about new software?
－In the magazines like Popular Electronics. That’s computer companies usually advertise.
| A．which | B．where | C．what | D．why |
______the address, Tom sent the email to his teacher.
| A．Having checked | B．Checked | C．Being checked | D．To check |
They all wanted to stop working because they were tired, but ___of them would say sl.
| A．any | B．some | C．none | D．neither |