These young men became doctors after six years training.
=> After these young men ________________________________

 Because of the absence of the atmosphere on the moon, the sky there is black, just as in space.
= > Because there ________________________________

As people use a lot of wood-pulp, many trees are cut down.
The more ________________________________

 I was surprised to find he’d gone behind my _____.

A. hat                                B. back                             C. thought                    D. leg

 After all, he only __________ . He never does what he promised .

A. speaks with a forked tongue                               B. has one foot in the grave

C.  smells a rat                                                           D. jumps through hoops

This information is too important, you can’t sweep it under  the ______.

A . tracks                          B. carpet                           C.  back                        D. hat

It’s obvious that  she’s lying through her _____.

A. hat                                B. teeth                             C. head                         D. back

When you’re  ________ trying to start a business, you should  utilize every minute you have.

A. breaking your back                                              B. raising a finger

C. pulling your socks up                                                                                D. going through thick and thin

She _______ in order to send her children to school.

A. cut corners                                                            B. worked her fingers to the bone

C. made a meal of it                                                  D. called it a day

If you know what you really want, you should ______ to get it.

A. pull their weight                                                   B. go all out

C.  pull your socks up                                               D. fight tooth and nail