He found the course difficult so he had to spend most of his time on study.
Giải thích: difficult (a): khó
memorable (a): đáng ghi nhớ, không thể nào quên easy (a): dễ dàng
interesting (a): thú vị hard (a): khó, cứng
=> difficult >< easy
Tạm dịch: Anh ấy thấy khóa học rất khó nên anh ấy đã phải dành phần lớn thời gian để học.
Đáp án: B
Gói VIP thi online tại VietJack (chỉ 400k/1 năm học), luyện tập gần 1 triệu câu hỏi có đáp án chi tiết
More people are now employed in service industries than in manufacturing.
The government is being widely criticized in the media for falling to limit air pollution.
The council has spent an enormous amount of money on this project.
We have to employ extra staff to deal with the increased workload.
If we use robots instead of humans, many people may be out of work.
After the marriage, Ruth decided to settle permanently in New York.
The palace was badly damaged by fire, but was eventually restored to its original splendor.
Despite having a bigger and cheaper choice of healthy foods, many Americans have lost a lot of weight.
He had never experienced such discourtesy towards the president as it occurred at the annual meeting in May.
That is a well-behaved boy whose behaviour has nothing to complain about.