快點回答下啦!

You"ll understand after reading the Chinese translations.
你睇埋中文解釋, 你就會明啦!!

1.I think I [should] buy a new one.
我諗我 [應該] 買番一隻新
2.How much [can] you spend on a new watch?
你 [可以] 花多少錢買隻新錶?
3.I think you [should] not buy an expensive one.
我諗你唔 [應該] 買隻貴嘅
4.That's right! I [must / should] take care of my new watch!
啱! 我 [必須 / 應該] 錫住我隻新錶!
(所以, must同埋should兩個都得, 但係should比較合適)

1. .I think I__should____ buy a new one.

2. .How much__can_______ you spend on a new watch?

3. I think you___must_____not buy an expensive one.

4. That's right! I___must______ take care of my new watch!

1. should
2. can
3.can
4. must

1. should
2. can
3. must
4. must

80%岩~