问题
选择题
It wasn’t until a month later ____ I received his letter.
A．that
B．since
C．when
D．as
答案
：A
：考查强调句型。本题是强调句型，是对not until a mouth later 进行强调，故A正确。句意：直到一个月后，我才收到一封信。故A正确。
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It wasn’t until a month later ____ I received his letter.
A．that
B．since
C．when
D．as
：A
：考查强调句型。本题是强调句型，是对not until a mouth later 进行强调，故A正确。句意：直到一个月后，我才收到一封信。故A正确。
