I’m very disappointed with my neighbor．She said she would keep her cat off my grass, but she ________．

didn’t

hasn’t

wouldn’t

hadn’t

The village is far away from here indeed．It’s ________ walk．

a four hour

a four hour’s

a four-hours

a four hours’

The science of medicine, ________ progress has been very rapid lately, is perhaps the most important of all sciences．

to which

in which

with which

among which

It can’t be a(n)________ that four jewelry stores were robbed in one night．

coincidence

accident

incident

chance

This kind of flowers is ________ in our hometown．

common

usual

ordinary

normal

Not only ________ polluted but ________ crowded．

was the city; were the streets

the city was; were the streets

was the city; the streets were

the city was; the streets were

Generally speaking, if ________ according to the instructions, the electric-bike is not so dangerous as reported．

riding

ridden

to ride

to be ridden

I would rather ________ to the theatre than stayed at home that night．

go

went

to have gone

have gone

Did the dog’s barks last night ________ your peace of mind?

disturb

interrupt

worry

disorder

The rich ________ already had their problems while the poor ________ trying to get wealthy．

has; are

have; are

has; is

has; are