_______their shift, the doctors went home. (Having finished/Having finish) -Perfect Participle Clauses

Fill in the blank space. I ________for over an hour before the taxi arrived. (have waited/had been waiting/had waited) -Past Perfect Continuous Tense

Fill the blank space. The scientist_______ decided which company she wants to join. (hasn't yet/has yet to)

Fill in the blank space. I _______ to sail across the ocean, but the boat never arrived. (had planned/have planned/have been planed) -Past Perfect Tense

_______dressed, the journalist went downstairs. (Having got/Having get) -Perfect Participle Clauses

Fill the blank space. Scientists _____ find a way for humans to achieve immortality, and I don't expect them to. (have yet/have yet to)

______ he feels stressed, he becomes impatient. (wherever/whoever/whenever)

Rewrite the sentence. I don’t go to extremely cold places. → I have __________ . (Present Perfect Tense)

______ is the most honest person should lead the team. (whenever/whoever/whatever)

______ the weather was awful, we still completed our expedition on schedule. (Even though/Although/In spite of) -Conjunctive Adverbials

Rewrite the sentence. Is this your first time seeing a desert? → Have you __________. (Present Perfect Tense)

Rewrite the active form to passive. Engineers are building a new robot. (Present continuous passive)