121. have

122. left 

123. will send

124. went, had lost

125. will have been

126. had heard, hurried

127. will not give, have finished

128. am decorating

129. is writing

130. will look

131. was

132. has been

133. would be

134. comes

135. is

136. built

137. was having

138. has lived

139. go

121. I am going to write John as soon as I (have)……have….spare moment.
122. The thief was arrested as he (leave)……left…. the bank.
123. We (send)…will send…… the money as soon as the goods are delivered.
124. Before we (go)…went…very far we found that we (lose)………had lost……. our way.
125. By the end of this year I (be)……will have been……..here for fifteen years.
126. After I (hear)……had heard…. the news yesterday evening I (hurry)……hurried…… to see him.
127. I (not give)……won't give………another cake till you (finish)……have finished….your milk.
128. I‟m busy at the moment. I (decorate)………am decorating…….the living room.
129. I see that Tom (write)………is writing……..his composition.
130. He says that he (look)……will look…….for a job next week.
131. They think he (be)……was………here last night.
132. He tells us that he (be)……has been………..to the mountains before.
133. I hoped that he (be)……would be…….. able to attend.
134. He wants to do it before his father (come)…………comes……………
135. The student who answered the question (be)……is………..John.
136. This is the house that Jack (build)……built…………..three years ago.
137. Mary (have)………was having…….. dinner when her friend called.
138. John (live)……has lived………… in the same house since he left school.
139. Shut all the windows before you (go)…………go……….out.