题目内容
He seems too tired today, and I wonder__________ he got a good sleep last night.
| A.when | B.that | C.if | D.where |
C
他今天看起来很累,我怀疑他昨晚是否睡好了。if引导宾语从句。故选C。
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| A.when | B.that | C.if | D.where |