61. Alexander Graham Bell first (introduce) _________ the telephone in 1876.62. Pierre (learn) _________ French for several years.63. When I (come) _________ home yesterday, everyone (go) _________ out. No one (be)_________ there.64. I feel terrible. I think I (be) _________ sick.65. Tom (study) _________. Please don’t disturb him.66. When Tom arrived at the cinema, the film (start) _________.67. My brother (enjoy) _________ swimming since he (be) _________ young68. What _________ you (do) _________ at this time yesterday ?69. Before I (go) _________ to bed last night, I (already / finish) _________ my homework.70. Last night while I (write) _________ a letter, the phone (ring) _________.71. The baby (behave) _________ wonderfully up to now.72. We stopped for a rest after we (walk) _________ for 2 hours.73. Look ! That plane (fly) _________ towards the airport. It (land) _________.74. Listen ! Somebody (knock) _________ at the door.75. I usually (wear) _________ jeans and a T – shirt on the weekend.76. This is the first time I (do) _________ this experiment.77. She often (go) _________ to the pagoda because her religion is Islam.78. I (walk) _________ to school every day.79. He usually (get) _________ up at 6 o’clock.