—Amy, please tell the people seated and ________ for their turns to come to my office five minutes later.—Yes, sir.
At last,we found ourselves in a pleasant park ________trees providing shade(荫凉)and sat down to eat our picnic lunch.
.Manufacturers should have professional productivity and technical knowledge to ______ the quality of the products.
.It was in the 1990s _______ we were working together ____ we made friends with each other.
—Tom, help me buy two tickets for this weekend’s concert online. —Sorry, there is no ticket _______ online now.
Anti-Japanese War _______ in 1937 and it _______ eight years