Answer: D) Aren't allowed to.
Explanation for this question is being written.
Answer: D) Was able to.
Answer: C) Don't
Answer: A) Ask
Answer: D) Not eat.
Answer: B) Very much doubt.
Answer: D) Wonder
Answer: D) All of the above.
Answer: A) Ought
Answer: A) You had better stop drinking.
Answer: B) Had
Answer: A) He is bound to pass his exams.
Answer: D) Need
Answer: A) Let
Answer: A) Don't be sad!
Answer: B) Had better.
Answer: A) Is to.
Answer: A) They are semi modals with only one form.
Answer: C) Had better.
Answer: A) TRUE
Answer: A) Had better.
Answer: C) Needs
Answer: B) Yes, 'need to' can be considered a semi-modal verb.
Answer: B) Don't
Answer: B) Doesn't have to.
Answer: A) Supposed to be.
Answer: C) Had better not.
Answer: A) Don't cross.
Answer: B) Helping verb.
Answer: B) Don't allow.
Answer: B) Hope you don't feel.
Answer: A) Obey
Answer: A) Was allowed to.
Answer: A) The verb 'let' is commonly followed by the bare infinitive.
Answer: A) He/she/it
Answer: A) I tend not to go out during the week.
Answer: B) Were supposed to.
Answer: C) The teacher asked the students to retake the test?
Answer: B) Leave
Answer: A) Is entitled to.
Answer: A) Allowed
Answer: B) Managed to.
Answer: B) Modal verbs do not use to infinitive, while semi-modals use to infinitive.
Answer: D) Aren't allowed.
Answer: B) Wasn't supposed to.
Answer: B) Let
Answer: A) She is to leave at ten tomorrow.
Answer: C) Supposed
Answer: B) Make
Answer: C) Let
Answer: A) Supposed to.
Answer: B) GO
Answer: A) Aren't
Answer: B) Lets
Answer: A) Had better not.