Only then _________ that I can erase the wrong words I have written, but I can’t erase the things I have done.
| A．did I realize | B．have I realized |
| C．I realized | D．I did realize |
The Ministry of Education is ______ that primary and middle school students perform one hour of physical exercise a day.
| A．advocating | B．inspecting | C．recommending | D．commanding |
The teacher called Tom to his office because he was caught ______ in the exam.
| A．to cheat | B．cheating | C．cheated | D．cheat |
Experts warn that global warming will cause climate changes, including more ______ floods, heat waves and droughts.
| A．frequent | B．usual | C．ordinary | D．common |
The most satisfying life is one ______ you know the things you’re interested in and pursue it in your own way.
| A．why | B．where | C．to whom | D．on which |
— Li Lin hasn’t turned up yet, but he promised to come to the party.
— He ______ home. He is a man of keeping his word.
| A．can’t leave | B．won’t be leaving |
| C．could have left | D．must have left |