6. To explain some grammartical rules is easy.
– It’s ……………………………………………………………………
7. To study Vietnamese is not very difficult.
– It’s …..…………………………………………………………………
8. To make her laugh is not easy.
– It’s …………………………………………………………………….
9. It’s difficult to learn English.
– To learn ……………………………………………………………….
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