They suddenly returned ________ a rainy day.

Huck, how old is your mother this year — . And we had a party for her birthday last weekend.

依次填入下面一段文字横线处的语句，衔接最恰当的一项是（ ）天鹅悠闲自在、无拘无束，它时而在水上遨游，________________它似乎是很喜欢接近人的，只要它觉得我们不会伤害它。①时而沿着水边， ②回到有人的地方， ③时而到岸旁嬉戏， ④享受着与人相处的乐趣 ⑤时而离开它的幽居 ⑥ 藏到灯芯草丛中

How can you expect him to make any improvement ________ you never give him an opportunity to have a try?

What are you going to do next weekend-_______-,if time permits ,I may go to Beijing with my friends.