Choose the best answer

46. These trees need(A) to water (B). They look withered (C) because of (D) the lack of water.
47.  Peter introduced (A) Mai with (B) some of (C) his
friends in (D) London.
48. She was (A) made stay at (B) home all day to look
after (C) the children (D).
49. Tom's parents never let (A) him to go out(B) with (C)
his friends a weekends (D).
50. I'm delighted(A) hearing (B) that you have made (C)
much progress in (D) your study recently.