什么是窦口鼻道复合体?窦口鼻道复合体的名词解释是?
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______ had the plane landed than the people ran towards it.
(a) Hardly
(b) No sooner
(c) Seldom
(d) Now that
I _____ be a secretary than an actress.
(a) should
(b) would rather
(c) ought to
(d) would rather to
She has caught cold, because she completely forgot ____ the windows last night.
(a) locking
(b) being locked
(c) to lock
(d) to have locked