due to，at that time，the number of，rather than，by mistake，in fear，come across，cut off，millions of，have a good effect on

（1）

The number of

The number of

the workers in this factory has increased to 300.
（2）The theory was so complex （复杂的） that few people could understand it

at that time

at that time

.
（3）At their worst，they may threaten to take children out of college or

cut off

cut off

living expenses.
（4）It was when I got back to my apartment that I first

came across

came across

my new neighbors.
（5）I would cry out

in fear

in fear

，as the noise of war beat down around me.
（6）A recent survey suggests that women can find more joy from relationships，

rather than

rather than

successful careers.
（7）She discovered artemisinin，a medicine which saved

millions of

millions of

lives.
（8）He found one mixture that seemed to

have a good effect on

have a good effect on

headaches.
（9）I took another passenger's luggage

by mistake

by mistake

on the bus yesterday.
（10）

Due to

Due to

the lack of evidence for a satisfactory explanation，the Strange Slope is still regarded as a mystery.