Anyone, once ____ positive for Ebola, the deadly disease, will receive free medical treatment from the government.
| A．testing | B．being tested |
| C．tested | D．to test |
When the old man _______to walk back to his house，the sun________itself behind the mountain．
| A．was starting；hid | B．had started；had already hidden |
| C．had started；was hiding | D．started；had already hidden |
I wrote a letter of compl
aint(投诉)，and the airline have promised to _______the matter．
| A．1ook at． | B．1ook into | C．1ook after | D．1ook out |
I'm happy that you agreed to work with us again．and I look forward to______
you next week．
| A．being seen | B．see | C．seeing | D．having seen |
--- Could I use your computer for a few moments, please?
--- ________. I’m not using it myself.
| A．Come on | B．It depends | C．Go ahead | D．That’s great |
People have always been curious _________ how living things on the earth began.
| A．in | B．at | C．of | D．about |