Question

YY

想請問為什麼不能選D

牛刀小試
。
B:
) 1. There have been several experiments
product could be used on humans,
(A) to carry out
L
r
on animals to see if the new
(B) carried out (C) carrying out
sequt the new
(D) which carry out

Answer 1

✨ 最佳解答 ✨

😁🤣

因為是被動，原本是which is carried out ,省略which和is以後就會變成carried out
(D)是主動

YY

謝謝！