She smiled happily because her son came back safely after five years in Iraq.

My students are very interested in working on the farm with the peasants' children.

The doctor examined Tom's health and gave him a sad look.

They didn't call me as they promised when we were working together in London.

I was late for work because my car broke down on the freeway.

Thomas said that he is looking for a job with a higher salary and longer holidays.

This morning, she asked me who I was with last night.

If you work hard, you will be successful in everything you do.

They asked me what had happened last night, but I was unable to tell them.

My class had an excited field trip in Dong Thap last summer.

Books have been written to provide knowledge and enrich our minds.

They were all looking forward to spending their holiday at the seaside the following summer.

Corrected sentences:

1. If you work hard, you will be successful in everything you do.
2. They asked me what had happened last night, but I was unable to tell them.
3. My class had an exciting field trip in Dong Thap last summer. (no changes)
4. Books have been written to provide knowledge and enrich our minds.
5. They were all looking forward to spending their holiday at the seaside the following summer.

Changes:

• In sentence 10, "hardly" should be "hard".
• In sentence 11, "did happen last night" should be "had happened last night".
• In sentence 16, "Truc" should be "Thuy".
• In sentence 17, "→ He" should be "He said".
• In sentence 18, "→ It" should be "It said".   
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