Helping others is a habit, ________ you can learn even at an early age．

it

that

what

one

Your house is always so neat－how do you ________ it with three children?

manage

serve

adapt

construct

Up to now, the program ________ thousands of children who would otherwise have died．

would save

saves

had saved

has saved

The living room is clean and tidy, with a dining table already ________ for a meal to be cooked．

laid

laying

to lay

being laid

The school rules state that no child shall be allowed out of the school during the day, ________ accompanied by an adult．

once

when

if

unless

Sam ________ some knowledge of the computer just by watching others working on it．

brought up

looked up

picked up

set up

Before the sales start, I make a list of ________ my kids will need for the coming season．

why

what

how

which

I ________ have watched that movie－it'll give me horrible dreams．

shouldn't

needn't

couldn't

mustn't

That's the new machine ________ parts are too small to be seen．

that

which

whose

what

I have a lot of readings ________ before the end of this term．

completing

to complete

completed

being completed