Please call my secretary to arrange a meeting this afternoon，or________it is convenient to you

You can’t become infected_______ HIV by swimming in a pool, or sitting in a bath

Out­­­­­­­­­ _____, with an apple in his hand．

The boys are going to play football after school.— Um, Don’t forget ___________ them __________ on the road. It’s dangerous.

l ______ truth, he is at ______ loss whatto do currently