It is the in this country to go out and pick flowers on the first day of the spring．
A．use B．custom C．habit D．normal
Michael be a policeman, for he is much too short．
A．needn’t B．can’t C．should D．may
The teacher apologized late．
A．to his students to arrive B．to his students for arriving
C．at his students to arrive D．at his students for arriving
Smoking is a bad habit．You should it．
A．throw B．get away with C．get rid of D．throw away
Columbus _________ the New World in 1492.
A．discovered B．found C．found out D．looked for
I’ll finish the job ____ I come across great difficulty.
A．however B．even though C．no matter D．as though
