1) "Since then, he ....... around the world" a) have travelled b) has travel c) has travelled 2) "Scientist have studied the people in Okinawa .... 1970 " a) for b) since c) in 3) " He has been a heart sergeon.... 37 years" a) for b) since c) at 4) We use "FOR" to talk about.... a) a specific time (year) b) a specific time (at 4 a.m) c) a period of time (how long) 5) We use "SINCE" to talk about.... a) a specific time (years) b) a specific time in the future c) a period of time (how long)

Present Perfect. INTRO

Leaderboard

Visual style

Options

Switch template

Continue editing: ?