As ________ , they were waiting for us at the airport.A．planB．planningC．being p

题型：不详难度：来源：

As ________ , they were waiting for us at the airport.

A．plan

B．planning

C．being planned

D．planned

答案

解析

本句考查as引导非限制性定语从句。As planned句中省略了it was。

举一反三

. Leave your key with a neighbor __________ you lock yourself out one day.

A．ever since	B．even if
C．soon after	D．in case

题型：不详难度：| 查看答案

.Most birds find it safe to sleep in the trees, but __________ they have eggs or young chicks, they don’t use a nest.

A．why	B．how
C．unless	D．where

题型：不详难度：| 查看答案

. He was told that it would be at least three more months __________ he could recover and return to work.

A．when	B．before
C．since	D．that

题型：不详难度：| 查看答案

.I won’t call you, __________ something unexpected happens.

A．unless	B．whether
C．because	D．while

题型：不详难度：| 查看答案

.__________ he had not hurt his leg, John would have won the race.

A．If	B．Since
C．Though	D．When

题型：不详难度：| 查看答案