Question

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1) put...books into the bag (this/these)
2)how much is...dictionary? (that/those)
3)look at...beautiful flowers! ( that/those)
4) do you like...picture? (this/these)
5) is...your brother next to the board? (that/those)

Answer 1

1. these
2. that
3. those
4.this
5.that

Answer 2

1) put these books into the bag. 
2) how much is that dictionary? 
3) look at those beautiful flowers! 
4) do you like this picture? 
5) is  that your brother next to the board?