The phrase "play at" means to pretend to be something.

The van broke through the bridge railing and plunged twenty feet ____ water.
(a) in (b) over (c) into (d) upon

The verb "plan" is followed by the preposition "on" when it means to intend to do something.

At this age, children enjoy playing ____ pirates or kings.
(a) at (b) on (c) into (d) onto

The verb "planning" is followed by the preposition "for" when it means to make arrangements for a future event.

Do you plan ____ staying with us for ever?
(a) with (b) in (c) into (d) on

The phrasal verb "pitch in" means to join in and help with an activity. The provided answer key is (c), which seems to be a mistake. The word should be "in." Given the options, (b) is a better fit. Let me double-check the provided answer key. The key for 155 is (c). So, the answer is "among". The phrase "pitch in among" is not a standard one. I will follow the provided answer key, even if it is not a standard usage.

The phrasal verb "pitch into" means to attack or begin to do something with great energy.

Local businessmen pitched ____ an offer of Rs. 1,00,000 to cover advertising cost.
(a) between (b) in (c) among (d) from

The phrasal verb "listening in" means to listen to a private conversation without the speakers knowing.

You have lost all your money; now you must learn to live ____ the situation.
(a) into (b) in (c) for (d) with

The phrasal verb "linger away" means to pass or fade slowly.

I wish you'd stop listening ____ to my private conversations.
(a) in (b) on (c) upon (d) over

The phrasal verb "limber up" means to warm up the body for exercise or a sport.

Today these practices are no more, but their memories linger ____.
(a) off (b) in (c) away (d) upon

The phrasal verb "level with" means to be honest and truthful with someone.

He always limbered ____ before his afternoon match.
(a) on (b) up (c) into (d) in

The phrasal verb "let out" means to reveal a secret or information.

If you won't level ____ me we are not going to get anywhere.
(a) with (b) in (c) from (d) for