You _________lose your way if you walk alone in the mountains at night.A. may B need C. should D. ought to
When you are planting trees, the trees ________ straight in the hole.
I was about to park my car when a policeman stopped me. He pointed to a sign “________”.
Jim is a nice boy ________ likes helping others.
----Can you tell me _________ ? ----They cost 200 yuan.
---- ________ will your father come back from Beijing? ---- In two days.