Crucial
Vital
Paramount

A piece of cake
Effortless
Straightforward

Arduous
Challenging
Demanding

Improve significantly
Make progress
Enhance one's skills

Enormous
Immense
Vast

Tiny
Minute
Negligible

It is worth noting that
Bear in mind that
It should be emphasized that

Due to the fact that
Owing to
As a result of

For instance
To illustrate
Namely

From my perspective
As far as I am concerned
In my view

1. The reason why I learn English is because I want to study abroad.

2. The reason why she is crying is because she lost her phone.

3. The reason why they moved is because they found a better house.

(Answer) Well, there are some specific attributes that make good friends.

(Supportive idea) To me, a good friend should be dependable and sincere who is always willing to do stupid things with you and give you a lot of motivation to overcome fierce times. I usually don’t get on well with over-sensitive or complicated people.

(Answer) To be honest, I don’t stay in touch with a lot of my childhood friends.

(Reason) I’m quite an introvert and somehow prudent in relationships, so I just talk to one old friend,in whom I can confide. We have known each other since primary school and maintained this special bond till now.

(Answer) I like people who are honest with themselves and others and not pretentious. Besides, I’m also attracted to those who share a good rapport with everyone but at the same time don't get afraid to take a stand, who handle stressful situations with humor, who have
self-respect but no ego and are willing to explore the world around them.

(Answer) Well, I hope so.

(Reason) From my perspective, good friends are especially important during times of crisis and turbulence. When my friends go through a hard time, I never
fail to cheer them up and help sail them through both emotional and academic setbacks.