When he knocked at the door, my mother was busy ___

When he knocked at the door, my mother was busy ____ supper.

#94849

preparing for

in preparing

to prepare for

to prepare

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--Where did you put my dictionary after using it this morning? --I put it back ______ I took it.

#94105

at which

where

there

there where

There is no doubt      the earth is becoming warmer.

#92981

whether

that

why

As far as I see, ______ is no possibility ________ she will lend me a hand.

#92174

it; that

there; that

at; whether

there; whether

 I didn’t manage to do it _____ you had explained how.

#94719

until

unless

when

before

—Would you prefer to attend a private tutor?—I’d rather _____ for a class than _____ a tutor.

#93303

to sign up; have

to sign up; to have

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