Question

请各位帮我解答一下几道英语题！？ 我先谢谢大家了~\(≧▽≦)/~

(1) Psychological research has____a number of basic principles that help memory.
A concentrate in
B engaged in
C involved in
D focused on

(2) Diamonds are made____carbon.
A of
B up of
C from
D in

(3) Silver ornament is becoming popular____girls nowadays.
A towards
B with
C to
D for

Answer 1

1. D
固定短语concentrate on，不是concentrate in，排除A；
固定短语be engaged in和be involved in，排除BC。

2. C
be made of是指“成品里面能看见原材料”的，“钻石”里面肯定是用肉眼看不到“碳”的，所以必须用be made from。

3. B
固定短语：be popular with/among sb，意思是“在...中广受欢迎”。

追问

请问这题呢~？能帮我解答一下么，谢谢
4 Diamonds are made____carbon.
A of
B up of
C from
D in

Answer 2

1.B
2.A
3.D

Answer 3

C C B

Answer 4

C ,A,B.