You must be careful how you answer this question. 划线部分是什么从句?

You ______ be too careful when you drive a car in the rush hour.A．might notB．must notC．can

In doing experiments, you must be ______ the precision instruments.A．more than careful wit

Woman: What an accident! If you have been careful, things would not be as they are. Man: W

If you want to grasp English you must carefully

If you want to grasp English you must carefully 【

Doctors say anger can be an extremely damaging emotion unless you learn how to deal with