Question

—I called you at 4:00 yesterday afternoon, but no one answered.
—Sorry, I ______ with my friends at that time.

A．swim

B．swam

C．will swim

D．was swimming

Answer 1

D

考查時(shí)態(tài)。根據(jù)時(shí)間狀語(yǔ)yesterday afternoon,可知要用過(guò)去時(shí)態(tài)；再據(jù)at that time，可知要用過(guò)去進(jìn)行時(shí)態(tài)。所以選D。