—Would you have come to his help, had you been free?
—Yes. But I______ engaged.
| A．was | B．were | C．hadbeen | D．wouldbe |
.It is reported that the United States uses energy as the whole of Europe.
| A．as twice | B．twice much | C．twice much as | D．twice as much |
The workers are trying hard to produce as many cars as they can the people’s needs.
| A．to fit | B．meet | C．to satisfy | D．suit |
It’s generally considered unwise to give a child he or she wants.
| A．however | B．whatever | C．whichever | D．whenever |
to looking after her sick mother for two years,she badly needed a holiday.
| A．Having devoted | B．Devoted | C．To be devoted | D．To have devoted |
I failed in the fimal examination last term and only then the importance of studies.
| A．I realized | B．I had realized | C．had I realized | D．did I realized |