I always prefer getting up early rather than going to school without breakfast．

We ought to invest in new machinery rather than building．

He still kept up with us after he went abroad．

She had to run to keep up with them．

He has some difficulties in his study, but with his comrades’ help he has kept up with the class．

She pretends to great knowledge．

Let’s play a game and pretend that we’re policemen．

He pretended not to have heard about it．

The project is in the charge of an experienced engineer．

An experienced engineer is in charge of the project．