Complete the sentences:

1. Foster said that he____famous if he____the race at the next Olympics. (be, win)

2. She said that she____the accident if she____ill at the time. (not/ have, not/be)

3. I told him that he____his last job if he___harder. (not/ lose, work)

( các bn giúp mk vs nhé )

Complete the sentences, using the correct tense of the verbs in brackets.

1. She said that if he____soon, she____him the present.( come, give)

2. He said he___at Jill if he___how unhappy she was.( not/ laugh, know)

3. Mrs Johnson said she____me in future if she____. (help, can)

4. The manager told her that unless she____the bill immediately, he___the police.

5. He said he ____if he_____more careful last time. (not/ fall, be)

Thu gọn tổng sau :

a) \(A=1+3+3^2+3^3+...+3^{100}\)

b) \(B=2^{100}-2^{99}+2^{98}-2^{97}+...+2^2-2\)

c) \(C=3^{100}-3^{99}+3^{98}-3^{97}+...+3^2-3+1\)

bn nào bt lm lm giúp mk vs

chứng minh rằng

a) \(8^7-2^{18}\) chia hết cho 14

b) \(5^5-5^4+5^3\) chia hết cho 7

c) \(7^6+7^5-7^4\) chia hết cho 11

bn nào bt lm lm giúp mk vs mai mk nộp r