根据句子的意思，用括号中所给汉语提示或英语单词的适当形式填空。（每空一词）

It's the____  time that I have visited the city of Yangzhou.  (four)

A friend of my____ bought my son this model plane.（father）

Reaching the top of the moutain,we were all breathing____ . (heavy)

I didn't hear the bell because it was too ____  in the classroom.(noise)

They have just had a ____ about where to spend their holidays(discuss)

Sandy had no difficulty____ up the Great Wall last Sunday. (爬)

In 1969, Armstrong ____  the spacecraft Apollo 11 on the moon.(着陆)

The____ is taking action to prevent the spread of the disease MERS.(政府)

April showers bring____ flowers; bees and butterflies play among flowers.(五月)

Ice fishing, a popular winter sport,is____ in many ways to regular fishing.(相似的）