Don't pretend ________ when you don't.

We ran down to the shore in time to see an enormous animal opposite us _____itself out of the water and then _____ down again, which was a whale..

The library needs ＿＿, but it will have to wait until Sunday．

He reached the station _____ only _____ that the train had just left. 

Those children don’t have to ____________ learn , for they always work hard voluntarily.