are some health problems that, when ____in time,can become bigger ones later on

I always get low marks in English exams. How can I improve my English, John— _____________. You should give it enough time to become better.

Hello, TomLong time no seeWhere were you?–Oh, not only my parents but also IParis for a month

I like the subject best, ＿＿＿＿＿ he doesn’t.

The children planted more trees and flowersafter they______Greener China