V. Use the correct form of the verb in brackets
1. I hope a time machine __________________ one day. ( invent)
2. Nothing _________________until they reach the decision. ( do)
3. Sondong Cave ___________________by thousands of people sofar. ( visit)
4. Don’t worry. If you don’t understand , the teacher_________________to you . ( explain)
5. your parents _____________to go to work very early ? ( used)
Loga
Sinh Học lớp 12
