* Why dinosaurs died out is still unknown.

* When we will get together has not been decided.

* How she can keep healthy is a secret. Whether he will come is not very important.

* That he was late again made me angry.

* Where they will go is unknown.

* That she missed the chance is really a pity.

Get the students to sum up the connectors in the given sentences.

what, who, which ,when, where, why, how ,that , whether

Step 4 Learn and Practice

1) Ask the students to fill in the blanks：

1___________ is needed for the space trip is careful preparation.

2.___________ wild life can be well protected is very important.

3._____________ will go makes no difference.

4._____________ dinosaurs died out remains a puzzle.

5. It hasn't been decided yet ______________ the restaurant will open.

6.___________ he will join us or not won't really matter.

7 .____________ is troubling me is that I can't follow him.

8.It is a pity _________ you have to leave now.

9.____________ the meeting will be held next week hasn't been decided yet.

10.____________ ream will win the match is still unknown.

2.) Make some sentences using subject clauses according to the pictures.