We must always lookout for friends.

• seeing
• waiting
• thinking
• searching
Correct Option: D  [ searching ]

Remark:

His folly has brought about his ruin.

• frustrated
• caused
• disappointment
• confirmed
Correct Option: B  [ caused ]

Remark: brought about: to cause something to happen.

There was no __________ in the rain.

• let up
• let in
• let off
• let go
Correct Option: A  [ let up ]

Remark:

The secret information was ________ from me.

• held away
• held off
• held back
• held out
Correct Option: C  [ held back ]

Remark: "held back": to refrain from revealing.

My friend _________ at seven this morning.

• took away
• got up
• left up
• kept up
Correct Option: B  [ got up ]

Remark:

His father advised him to be fair and square in his dealings lest he should fall into trouble.

• considerate
• careful
• alert
• honest and just
Correct Option: D  [ honest and just ]

Remark: "fair and square": honestly and according to the rules.

No one but his conscience advised him to come back to earth.

• return home
• return to earth
• return to reality
• be honest
Correct Option: C  [ return to reality ]

Remark:

We have no alternative plan to ________ on.

• fall back
• fall out
• fall for
• fall off
Correct Option: A  [ fall back ]

Remark: the phrase "to fall back on" means to have an alternative or contingency plan in case the original plan does not work out.

After a prolonged suffering he passed away.

• went away
• left
• expired
• yielded
Correct Option: C  [ expired ]

Remark: "passed away": demise, die

I cannot put up with that nasty fellow.

• appreciate
• endure
• control
• forgive
Correct Option: B  [ endure ]

Remark: