We have physics on Tuesday, Thursday and Saturday; that is to say, we have it ________．

every other days

every three days

every other day

each two days

A man may usually be known by the books he reads ________by the friends he keeps．

rather than

as well as

in place of

as many as

We are ________ to get the work done before May Day．

decided

demand

attempt

determined

You ought to have put the milk in the fridge．Now ________ sour．

it smell

it is smelt

it smells

it is smelling

The world ________ seven continents and four oceans．

makes up of

makes out of

is consisted of

consists of

The dictionary is being printed and soon it will ________．

turn out

come out

publish

come about

She had nothing to do but ________ some newspapers．

to read

read

reading

to see

We were swimming in the lake ________ suddenly the storm started．

when

while

until

before

He left quickly, with the door ________．

open

opened

opening

to open

Roses need special care ________ they can live through winter．

because

so that

even if

as