The old lady’s hand shook frequently. She explained to her doctor ________ this shaking had begun half a year before, and ________, only because of this, she had been forced to give up her job.
| A．when; how | B．how; when |
| C．how; how | D．why; why |
I was just going to cut my rose bushes but someone it. Was it you?
| A．has done | B．had done | C．would do | D．will do |
Dina, for months to find a job as a waitress, finally took a position at a local advertising agency.
| A．struggling | B．struggled | C．having struggled | D．to struggle |
John's success has nothing to do with good luck. It is years of hard work has made him what he is today.
| A．why | B．when |
C．which | D．that |
This coastal area a national wildlife reserve last year.
| A．was named | B．named | C．is named | D．names |
You buy a gift, but you can if you want to.
| A．must | B．mustn't | C．have to | D．don't have to |