A. has already gone
Feedback In this sentence we are given the time marker – the adverb ‘already’ that means ‘before the present time’. Therefore, the speaker is talking about something that happened in the past but is important at the time of speaking. To refer to events in the past but which connect to the present we use the present perfect simple that is formed from the present tense of the verb have and the past participle of a verb: I’ve seen the ballet performance ‘The swan lake’, but I want to see ‘Anna Karenina’.; We haven’t seen before, have we?Thus, for the test sentence ‘I can't find Mark. It seems he _______ (already / to go).’ we are to choose ANSWER 1 (has already gone).