3. When I (call)________ on my friend, he (go)________ out.

4. Mary (finish)________ her homework when her father (come)________ home from his ofice.

Exercise1. Simple past or past perfect.

1. She (feel)________sick after she (eat) a ________wholo box of chocolates.

2. After the doctor (examine)________ the child he (have)________ a talk with the mother.

4. He doesn't earn enough money to buy his favorite car.

-> If he...........................................................................

5. Attend the class regularly and you can pass the test easily.

-> If you...........................................................................

6. Unless you leave home now, you will miss the flight.

-> If you...........................................................................

2.I think you should spend more tim improving your pronunciation.

-> If he.......................................................................................

3. I don't feel confident at interviews because my English is not very good.

-> If my English.......................................................................................

1. We can't offer you the job because you can't speak English
-> If You.........................................

\(\left\{{}\begin{matrix}\dfrac{x}{2}-\dfrac{y}{3}=1\\5x-8y=3\end{matrix}\right.\)

30.They have just built a new bridge in the area.

->A new bridge.............................................

\(\left(\dfrac{1}{\sqrt{x}-1}+\dfrac{1}{\sqrt{x}-1}\right)\dfrac{x-\sqrt{x}}{2\sqrt{x}+1}\)

\(\left(\dfrac{1}{\sqrt{x}-1}+\dfrac{1}{\sqrt{x}+1}\right)\dfrac{x-\sqrt{x}}{2\sqrt{x}+1}\)