cer. 1 Several buildings last week. A have collapsed C have been collapsing 2 It hasn't rained ........ three weeks. A yet B for C since 3 John ........ as a rescue worker since 2009. A has been working B was working C worked buildings........ during the earthquake B collapsed 4 Frank........ back from Pakistan. A has just come C just come 5 James has......... volunteered for a charity. B never C yet A ever 6 Andy was happy because he ........ an award. A has won B had won C have won 7 If he ........ the news, he would have heard about the tornado. A watched B had watched C watches The 8 I wish I ........ some money to help the homeless. A have B had C had had B have just come 9 Tom isn't here. He ........ to the beach. A had gone B has been going C has gone 10 The children ........ lots of exotic animals at the zoo yesterday. A have seen B saw C had seen 11 They........ their tickets before they went to the airport. have already bought C already bought

Several buildings have collapsed during the earthquake.

It hasn't rained for three weeks.

John has been working as a rescue worker since 2009.

Frank has just come back from Pakistan.

James has never volunteered for a charity.

Andy was happy because he had won an award.

If he had watched the news, he would have heard about the tornado.

I wish I had some money to help the homeless.

Tom isn't here. He has gone to the beach.

The children saw lots of exotic animals at the zoo yesterday.

They had already bought their tickets before they went to the airport.