Tim is weak in math, so he is trying _________ up with other students now.

Theheadofthecompanypromisedtodealwithmattersofthissort ________hereturnedtohisoffice. [ ]

“We will learn English words this year,” the teacher said to the students.

Oh, you look tired. Why?—I ________ to the Great Wall yesterday. It was really wonderful.

He has read many books on history, so it’sfor him lo answer these questions.