From the ______ expression on his face we can guess something ______ must have happened to him.

It is normal for students to feel_______ before the examination even though they have prepared well.

 I know this is not quite the right word， but I can’t be bothered to think of ______.

-How are you getting on with your English study? --________. I tried my best, though.

.Would it be ________ for you to pick me up at four o’clock and take me to the airport?