Chúc mừng chị nhoa =)) Đỉnh wá!

1. Children prefer watching TV……….reading books.

A. from                 B. to                               C. of                     D. for

2. Video games can be …………….if you spend too much time on it.

A. interesting                  B. exciting               C. addictive                  D. wonderful

3. He ought …………..his homework before he plays tennis

A. to finish            B.  finish               C. finishing           D. finished

4. We may know the land very well, ………we know very little about the oceans.

A. but                   B. and                   C. because            D. so

5. My mother plays volleyball …………..

A. skill                  B. skillful                  C. skillfully                 D. not skillful

6.. …………………………………..   – I had a headache

A. What was wrong with you ?           B. What are you doing?            

C. What about you?                                     D. What would you like?

7. …………..didn’t she go to school yesterday? – Because she was sick.

A. Why                 B. What                C. When               D. How

8. My sister doesn’t like fish, and …………………….

A. either do I                   B. neither do I       C. neither I do       D. I don’t ,too

9. Two weeks ago, The Bakers ……………for a picnic in the countryside.

A. go                    B. going                C. will go              D. went

10.  Swimming can be fun but accidents can happened -> happen

                 A                  B               C                 D

Một gen có chiều dài là 0,408 micromet. Mạch 1 của gen có A, T, G, X lần lượt phân chia theo tỷ lệ 1 : 2 : 3 : 4. Tính số nu mỗi loại của mạnh thứ 2 của gen.

Gen A có A1 = 250, T1 = 350, %G1 = 25%, G2 = 35%. Gen A có khối lượng là bao nhiêu?

ea: meal, great, heart, head, seat, meat, leave,...

ie: lie, niece, view, piece, pie, hierarchy, hieroglyphic, hierarchical,...