1 to have the nerve

2 what a cheek!

3 to feel no shame

4 to overcome the shame

5 (is it) proper? (rhetorical question)

1 secret code

2 ciphertext

3 password

4 PIN

1 to think of

2 to long for

3 to miss

1 thought

2 thinking

3 idea

4 ideology

5 classifier: 个 gè

1 to reflect on

2 to ponder over

1 to set one's heart on sth (idiom)

1 think again and again before acting (idiom); consider carefully in advance

1 think three times then go (idiom); don't act before you've thought it through carefully

1 to act without taking time to think (idiom); to react instantly

2 to fire from the hip

1 inconceivable (idiom); unimaginable

2 unfathomable