Jawaban:

1. to achieve two aims at once.

2. to fail to get an answer or a result.

3. not being sincere.

4. unexpectedly.

5. totally wrong or misunderstanding something.

Penjelasan:

• kill two birds in one stone means to achieve or to get two goals at once or with one action. Example : By studying on the bus when I am on the way home, I kill two birds in one stone.
• I'm drawing a blank means to fail to get an answer. Example : I'm drawing a blank when I tried to remember all the mathematic formulas.
• Crocodile tears means not being sincere. Example : She's crying crocodile tears as her father didn't want to buy things she wanted to.
• It came out of the blue means unexpectedly. Example : The factory was just burnt last night. It came out of the blue.
• Bark up the wrong tree means misunderstanding something. Example : If you expect me to borrow you some money, you bark up the wrong tree.