Both Class 3 and our class won't be able to finish the work unless they ___ each other.
| A．team up with | B．come up with | C．put up with | D．catch up with |
Engines are to machines ________ hearts are to animals.
| A．as | B．that | C．what | D．which |
The last time we had great fun was ________ we were visiting the Water Park.
| A．where | B．how | C．when | D．why |
—I prefer shutting myself in and listening to music all day on Sundays.
—That's ________ I don't agree.You should have a more active life.
| A．where | B．how | C．when | D．what |
Part of the reason Charles Dickens loved his own novel，David Copperfield，was ________ it was rather closely modeled on his own life.(2010·北京)
| A．what | B．that | C．why | D．whether |
I'm afraid he's more of a talker than a doer，which is ________ he never finishes anything.(2011·山东)
| A．that | B．when | C．where | D．why |