There is a big tree _____ my house.

What does the sign over there read?—“No person __________ smoke or carry a lighted cigarette，cigar or pipe in this area.”

ney _____, the lplaces, such as bus stops, stations,airports and ports.

How do you react ________your father’s suggestion?—I reacted strongly ________it

You can nevertouch this machine when it ________, it is very dangerous