With so much noise of the traffic, I couldn’t ______ and do my research work.
An unhappy childhood may have some negative effects on a person's character; however, they are not always __________.
-How about this type of mobile phone? -__________. I'd prefer a 3G.
Henry goes to a free class every Sunday afternoon which __________ at 4 pm.
The lecture,__________ at 7: 00 last night, was followed by an observation of the moon with telescopes.
-Can you think of another good idea? -This is the best way I can imagine __________ the goal.