Question

______ Tom, we wouldn’t have been late for the last bus.

1. A.
   If we didn’t wait for
2. B.
   If we haven’t waited for
3. C.
   we hadn’t waited for
4. D.
   Had we not waited for

Answer 1

D
考查if非真實(shí)條件句的虛擬語(yǔ)氣，從主句用wouldn’t have been，可知是if we had not waited…,這也可以變成had we not waited，選D，句意是：如果我們沒(méi)有等湯姆，我們就不會(huì)趕不上最后一班車。選D。