6 câu nhỏ thôi, mn giúp mình vớiii 1. Climbing without a safety rope is forbidden. You a. aren’t allowed to climb without a safety rope. b. don’t permit to climb without a safety rope. c. aren’t forbidden climbing without a safety rope. d. had better climb with a safety rope. 2. Nigel hasn’t got satellite TV, so he can watch the game. If a. Nigel has satellite TV, he can watch the game. b. Nigel has got satellite TV, he would able to watch the game. c. Nigel had satellite TV, he could watch the game. d. Nigel would have satellite TV, he could watch the game. 3. Walking home alone is not a good idea. You a. can’t walk home alone. b. mustn’t walk home alone. c. don’t have to walk home alone. d. shouldn’t walk home alone. 4. ‘Did someone ring you an hour ago ?’ Martin said to Susan. Martin asked Susan a. whether anyone rang her an hour ago. b. if someone had rung her an hour before. c. whether someone rang him an hour ago. d. if anyone had rung her an hour before. 5. Throw a stone into water and it sinks. If a. you threw a stone into water, it would sink. b. a stone is thrown into water, it may sink. c. you will throw a stone into water, it sinks. d. you throw a stone into water, it sinks. 6. You can’t travel on this train unless you have a reservation. If a. you have a reservation, you can’t travel on this train. b. you don’t have a reservation, you can’t travel on this train. c. you don’t have a reservation, you can travel on this train. d. you won’t have a reservation, you can’t travel on this train.