30:17
STRUCTURE
2340 Views
01:56
READING COMPREHENSION &VOCABULARY
1284 Views
01:52
The Form of Irregular Verbs
1290 Views
01:59
The Tense of the Passive Voice
1372 Views
09:31
Changing from Active into Passive
1142 Views
07:20
The Form of the Passive Voice
1353 Views
03:29
What is the Passive Voice?
1393 Views
03:45
The Form of the Active Voice
1355 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1712 Views
03:20
Since vs For
1492 Views
04:50
Have or Has
1312 Views
00:49
Key Words: Present Perfect
3081 Views
09:03
The Use of the Present Perfect
1299 Views
03:08
Meaning and Form
1342 Views
02:40
Writing Formal Letters
1338 Views
03:10
Language Use
1932 Views
09:35
Parallel Structure
1485 Views
04:35
Prepositions of Instruments and Means
1318 Views
03:27
Polite Requests
1390 Views
06:30
May as a Modal of Permission and Request
1368 Views
04:11
Can as a Modal of Permission and Request
1181 Views
02:50
عناصر الاداء
1325 Views
03:45
شركة ستيرن
897 Views
01:15
مقياس القيمة المضافة
1119 Views
02:58
مقياس الربحية
1088 Views
02:39
معايير دركر
1240 Views
03:51
مقايس الاداء
1262 Views
01:41
اتخاذ اجراءات تصحيحية
959 Views
01:52
المرحلة الثانية من الرقابة
947 Views
02:49
مراحل الرقابة
2245 Views