The best way Tom suggests one’s strength is to run for 30 minutes every day.
| A．building up | B．to build up | C．build up | D．being built up |
Once ___ what to do, these computers will show great power in carrying it out.
| A．to teach | B．teaches | C．teaching | D．taught |
He talked about the classmates and the school ___ he had visited.
| A．which | B．that | C．who | D．about which |
Americans eat __ vegetables per person today as they did in 1910.
| A．more than twice | B．as twice as many |
| C．twice as many as | D．more than twice as many |
I wonder if you know it ___ .
| A．in all | B．all in all | C．above all | D．at all |
The number of people invited ___ fifty, but a few of them ___ absent for different reasons.
| A．were; was | B．was; was |
| C．was; were | D．were; were |