Mike, can you tell us something about our new teacher– Oh, sorry. I know nothing because I _____________ him before.

I remember __ to the seWe forgot __ an overcoat and I felt very cold.

The _______ of Xinjiang is peaceful, though many terrorists keep making trouble.- I believe those terrorists will fail in the end.

Those who are not _______ with the progress they have made will work harder.

. As a volunteer, he often goes to the hospital to ________ the sick.