3) Fill in the blanks with correct form of the verb according to given tense: 
 a) It is quite chilly outside. You .......your head covered.(keep. Simple Future)
 b) I .....from Arnav for a long time. (not hear. Present Perfect) 
C) He ......a song. (sing. Present Continuous.
 d) I.... my lunch. (had, Past Perfect) 
e) It ......heavily in July and August. (rain, Past Continuous )
f) Mother .....jams and pickles at home. (prepare. Simple Present)