1.A student who has studied English for a few years may have a vocabulary of thousands of words.

2.It was raining so hard that they could not work in the fields.

3.Although the school refused to give any help,the results of the experiment were sucessful.

4.He chose to study computer science because of its good employment prospects.

5.If Mary had caught the train,she wouldn't have walked very slowly.

1. A student who has studied English for a few years may have a vocabulary of thousands of words.

2. It was raining hard so that they could not work in the fields

3. Although the school refused to giv any help, the result of the experiment was successful.

4. Because of the good employment of computer science, he chose to study computer science.

5. If Mary hadn't walked very slowly, she would have caught the train.

@HOCTOT