_____it is to jump into the river to swim in summer. A.What a great fun B.What great fun C.How fun D.How funny 為什麼不用how fun？

_____it is to jump into the river to swim in summer. A.What a great fun B.What great fun C.How fun D.How funny 為什麼不用how fun？

選B
因為fun是名詞，而且不可數，A C不對.
funny雖然是形容詞，但意思是“滑稽的”，這裡要表達的是“有很多樂趣”，所以D不對
百度教育團隊【海納百川團】為您解答

It is dangerous for little children to swim in the river.為什麼這裡用to swim

固定句型
It's +形容詞+ for sb.+ to do sth.
真正的主語是動詞不定式to do sth.
To swim in the river is dangerous for little children.有點頭重腳輕，所以用形式主語it

make sure（）you have finished the work （）為啥要用that不用if

因為if後面不能接從句，如果要接從句，可以用whether
所以只能用that

______have finished the work can leave A Those who B Anyone C The old one

選A [那些已經完成工作的人可以離開.]
本題要用定語從句來表示，否則就有兩個謂語動詞[have finished和can leave]，所以排除B，C

seems incredible that he could have finished the work so soon.

聽起來不可思議，他能這麼快就完成了這項工作.

You have finished the work，_____you？

haven't
要和前面的‘you have…'接應.

shall we go shopping this weedend？A have a good time B i'm sure of that C that sounds good D it's very kind of you

C
我們這週末去購物怎麼樣？
好主意

i hope that you'll have a good time同義句，i ___you ___ ___a good time

i hope that you'll have a good time同義句，
I（wish）you（to have）a good time
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I'm sure that you have… that從句是什麼從句？ You不是從句的主語麼？ update: 找到了參考資料：

賓語從句

求高手幫看一下這句話有沒有錯誤：I'am sure that someday your english will be very good in the future

I'am sure that someday your english will be very good in the future.
“I'm”sure that someday your“English”will be very good in the future.
引號裏2個拼寫失誤吧，in the future和someday都錶未來時間，二選一吧.
）