_________ to frighten the poor man, Mrs．Richards quickly hid under stairs．

Not anxious

Anxious not

Being not anxious

Not being anxious

_________ by the teacher, Tom got into the classroom from the back door quietly．

To avoid being seen

Avoiding seen

Avoid being seen

Avoided seeing

The time is not far away _________ the news will be made known _________ will represent our company to attend the coming medical conference to be held in Beijing．

until; who

when; who

before; which

when; whenever

The TV Dwelling Narrowness(《蜗居》)is really fantastic．The show has succeeded in _________ much to the audience, which has contributed to its success．

giving away

going through

laying aside

getting across

Land animals are believed _________ from sea animals．

to have developed

to have been developed

having developed

having been developed

The salesman said that _________ thief was a young man with _________ brown hair．

the; a

the;/

a;/

a; a

We laugh at jokes, but seldom ________ about how they work．

we think

think we

we do think

do we think．

The report urged that all children ________ to swim．

be taught

should teach

could be taught

could teach

The girl had hardly rung the bell ________ the door was opened suddenly, and her friend rushed out to greet her．

before

until

as

since

________ regular exercise is very important, it's never a good idea to exercise too close to bedtime．

If

As

Although

Unless