It's ___ so easy as you imagine.

.If what your friend comes up with surprises you，don't reject it immediately._____，imagine that it is true.

He began to take English _______ only when he left school.

A car engine cannot run smoothly without motor oil.____ our body cannot function efficiently without vitamins.

— I think it’s beneficial to build a library near our dormitory building.—  　　　. It will be a great convenience.