摘要：7．Mr．Smith these days．I think he should take a holiday before he burns out． A．has been overworking B．overworked C．had overworked D ．was overworking
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Mr．Smith ________ these days．I think he should take a holiday before he burns out．
- A.has been overworking
- B.overworked
- C.had overworked
- D.was overworking
Mr．Smith ________ these days．I think he should take a holiday before he burns out．
[ ]
A．
has been overworking
B．
overworked
C．
had overworked
D．
was overworking