--______ are they?
--They are my ______.
| A．What, parents | B．What, parent |
| C．Who, parents | D．Who, parent |
Tom likes looking out ________ the playground __________ the classroom.
| A．at; of | B．of; at |
| C．of; from | D．at; from |
Which floor is your classroom ____________ that classroom building?
| A．on | B．in | C．on; in | D．in; on |
单词辨音 （本大题共5分，每小题0.5分）
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We were swimming in the lake _______ suddenly the storm started.
| A．until | B．while | C．when | D．before |
The price of petrol(汽油) is not _______ that of last year, so some more people are planning to buy cars.
| A．as expensive as | B．so cheap as |
| C．as low as | D．so high as |