Many students thought about the third question for quite a while and had great difficulty answering it. Obviously, it was _____ all.

—Where is my cell phone? I can’t find it. —Well, you ______ have put it somewhere.

You （ ） read the article if you don’t want to.

Three of us will go there, and the rest （ ） to stay here.

It is by no means clear （ ） the president can do to end the strike.

Ted, （ ） yourself and don’t get your coat dirty again, or you will get into trouble!

He studies so hard to avoid （ ） at the bottom of the class.

It （ ） that the jewels had been stolen by a traveler.

The doctor said that mental （ ） is the major cause of his sleeping problem.

Thank you for your letter of May 6, in which you _____ about the bicycles of Model 897.

The defense computers calculate way to （ ） the enemy missiles.

（ ） we have all the materials ready, we should begin the new task at once.