. In aerospace devices the weight of the necessary power producing equipment is _____.
| A．vital | B．possible | C．capable | D．reliable |
Many countries, for example, Mexico and Japan, _____a lot of earthquakes.
| A．have | B．having | C．to have | D．having had |
Mother told Jim to watch the milk until it boiled and then _____ off the gas.
| A．turn | B．turning | C．turned | D．having turned |
Your mother, however, ____ say that to us that day.
| A．does | B．did | C．is doing | D．was doing |
_____ with a good education can apply for the job.
| A．Who | B．Whoever | C．Anyone | D．Who ever |
He just does what he pleases and never _____ about anyone else.
| A．think | B．thinks | C．thinking | D．thought |