Tìm lỗi sai và sửa lại sao cho đúng, giải thích giúp mik luôn nha mn(mấy từ trong ngoặc là 1 trong những từ sai nha)

Many of my students enjoy to surf the web in their free time. (many, to surf, in, free time)

Tell me what is wrong for doing this job. (tell me, is wrong, doing, this job)

Printing was invented by the Chinese. (printing, was invented, by, chinese)

The number of the books in the library have risen to over five million. (number of book, in, have risen, to)

CHỌN ĐÁP ÁN ĐÚNG VÀ SỬA LỖI SAI (NẾU CÓ THỂ HÃY GIẢI THÍCH LÝ DO VÌ SAO LẠI SỬA CHỖ ẤY)

1. Tokyo is MORE (A) DENSELY POPULATED (B) than any ANOTHER (C) CITY (D) in the world.

2. Many THEORY (A) ON HOW (B) the Earth began its EXISTENCE (C)  HAVE BEEN (D) proposed. 

3. The TASK OF (A) the caartographer IS TO (B) represent the EARTH'S SURFACE (C) at a REDUCED GREATLY (D) scale 

4. X rays HAVE (A) important APPLICATIONS (B) not only in medicine and in INDUSTRY (D)

5. The TWO MOST (A) common methods FLORISTS (B) use to tint flowers ARE (C) the spray method OR (D) the absorption method

6. Plants REQUIRE (A) MUCH (B) FERWE (C) moisture in cold weather THAN (D) in warm weather. 

7. Not only DID HE (A) BROKE (B) two glasses, BUT ALSO HE (C) left the table DIRTY (D)

8. There are VARIOUS (A) reasons WHY (B) ONE SHOULD (C) avoid TO DISCUSS (D) religion

9. Mike REGRETS (A) HAVING NOT (B) STUDIED (C) english IN (D) high school 

10. UNLIKE (A) his fellow STUNDENTS, Jim preferred WRITTEN TESTS (C) THAN (D) oreal tests

GIẢI THÍCH VÌ SAO LÀ ĐÁP ÁN ĐÓ, NẾU CÓ ĐÁP ÁN SAI THÌ SỬA. MONG GIẢI THÍCH CHI TIẾT NHẤT CÓ THỂ; MÌNH K VỘI ĐÂU, CỨ TỪ TỪ MÀ TRẢ LỜI

a-  When he lived in Manchester, he (work) had worked in a bank

b-  Someone (steal) has stolen my handbag on the bus

c-  The Browns (live) had lived in Paris for 7 years when the second world war (break) broke out

d- People (speak) speak English in most of Canada (mình thắc mắc "people" ít hay nhiều)

e- She said that she (arrive) had arrived on time yesterday (mình thắc mắc đây có phải là câu gián tiếp k? Nếu phải tại sao "yesterday" giữ nguyên)

f- We thought they (move) had moved to California

g- We’ll have already gone before you (get ) get back

h- I’ll never forget the kindness that you (show) have shown me

i- The video film is so interesting that I (see) saw / had seen it twice (đáp án nào mới đúng hay cả hai sai, giải thích giùm)

j- I (never forget) will never forget what you (just tell) have just told me