(D)-- The shop is ___ on Saturday and Monday.
-- I see. I'll go here on Monday then.
A. open B. close C. opened D. closed

(A) The dinosaur’s eggs are found by explorers in the _______
A. 1920s B.1920’s C. 1920s’D. 1920’

(A) –Have you ever traveled abroad?
--Sure. I ____ the language of English in the USA two years after I graduated from the university.
A. used to learn B. was used to studying C. have studied D. didn’t use to study

解释一下谢谢

D)-- The shop is ___ on Saturday and Monday.
-- I see. I'll go here on Monday then.
A. open B. close C. opened D. closed

open 是名詞，也可以是動詞。但是習慣上總是說the shop is open.這是指店門開著的狀態。 或 The door was opened for me.指的是門被某人打開了。

(A) The dinosaur’s eggs are found by explorers in the _______
A. 1920s B.1920’s C. 1920s’D. 1920’

1920s 是正確表達1920年代的寫法。1920's 等於 1920 is xxxx.
1920s' 指的是有好幾個1920 年代。比如 the student's 那個學生的。the students' 那些學生的。


(A) –Have you ever traveled abroad?
--Sure. I ____ the language of English in the USA two years after I graduated from the university.
A. used to learn B. was used to studying C. have studied D. didn’t use to study

used to do something 的意思是我以前曾經怎樣。
比如：I used to love you, but not now. 我曾經愛你，但是現在不了。

was used to studying 指的是某個過去的特定時間裏曾經習慣了做某事，比如：
I was used to sleeping until noon on Sundays before I turned 20. 我在二十嵗以前習慣在星期天睡到中午。

C 指的是曾經學過。

D 是錯句。
所以只能選A.