I felt it hard to keep up with my classmates. But whenever I want to_ _, my teacher always encourages me to work harder.
_______ they are twin brothers, they don’t look like each other.
—Do you mind if I smoke here? —_______ You can go to smoke in the next door.
Sandy didn’t tell her parents that she was going home because she wanted to give them a _______.
This is _______ difficult problem that few students can work it out.
It’s nice _______ Andy _______ me with my English study.