ok nha

1-c

2-a

3-c

4-c

5-b

ok

1. A. at            B. in             C. to               D. from
2. A. There     B. They       C. That            D. This
3. A. climb       B. climbed   C. climbing     D. to climb
4. A. saw       B. see           C. seen           D. seeing
5. A. thrown   B. threw        C. throw         D. throwing
6. A. protecting  B. to protect  C. protected  D. protect
7. A. to throw     B. throw      C. throwing    D. thrown
8. A. were          B. are          C. was             D. is

hard=>harder

will finish => finish

although => because

are => is

making car => car - making

doing => to do

does => did

arranging => are arranged

although => Despite

sending => sent

1. on

2.  up

3.  up

4.  of

5.  for

đúng là người có chuyên môn