Smiles around the world _____ be false, _______ other feelings like anger, fear or worry.
| A．must; hide | B．shall; hiding |
| C．may; hide | D．can; hiding |
I want to ring him＿＿＿to know the reason why he rang＿＿＿while I was speaking yesterday.
| A．up； off | B．back； up | C．up； down | D．on； off |
—— ＿＿＿＿＿＿ shall we have to go?
—— Another five miles.
| A．How farther | B．How long | C．How far | D．How much farther |
Are you paying now, or shall I ＿＿＿＿＿＿ to you?
| A．book it down | B．book it in | C．book it up | D．book it out |
Please drop ＿＿＿＿＿＿＿ my home when you are free.
| A．in | B．on | C．in on | D．in at |
Don’t worry too much about ___ mistakes.They ae ___ natural part of learning.
| A．the, a | B．/, a | C．the,/ | D．the, the |