_________ is said that most teenagers have problems such as Li Ming’s.
| A.That | B.This | C.It | D.She |
Let____help____.
| A.they, you | B.us, his | C.me, them | D.we, you |
I think____ important to learn English well.
| A.this | B.that | C.it | D.you are |
I find ________ difficult to remember everything, though I’m still young.
| A.that | B.this | C.it | D.what |